The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 46 hours. Why not try and solve them ahead of time?
Gray Code Decoder in all languages in bytes. Achievements Cheevos Holes Languages Medals Miscellaneous All Holes 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Multitap Input Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 ArkScript Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig 05AB1E APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> ALGOL 68 ArkScript Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig Experimental Language 05AB1E APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Hole All 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Multitap Input Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 320th error256 0 91 62ms 12 Jan 2026 320th error256 0 91 293ms 14 Jan 2026 320th GolfingSuccess 🇬🇷 0 91 272ms 14 Jan 2026 320th Natanaelel 🇸🇪 0 91 333ms 5 days ago 320th Steffan153 🇫🇮 0 91 57ms 3 days ago 326th Shanethegamer 🇺🇸 0 92 462ms 20 May 2025 326th Yax42 🇫🇷 0 92 68ms 5 days ago 326th edsrzf 🇳🇿 0 92 18ms 3 days ago 329th Yax42 🇫🇷 0 93 392ms 5 days ago 330th Shanethegamer 🇺🇸 0 94 383ms 13 Dec 2024 330th edsrzf 🇳🇿 0 94 459ms 20 May 2025 330th MeWhenI 🇻🇦 0 94 396ms 4 days ago 330th edsrzf 🇳🇿 0 94 6ms 3 days ago 330th albanian-laundromat 0 94 6ms 3 days ago 330th madex 🇩🇪 0 94 99ms 29 hours ago 336th albanian-laundromat 0 95 114ms 6 Jan 2026 337th Shanethegamer 🇺🇸 0 96 427ms 3 Jun 2025 337th CaedenHarper 🇨🇦 0 96 416ms 5 days ago 337th edsrzf 🇳🇿 0 96 32ms 5 days ago 337th kumavale 0 96 160ms 3 days ago 341st albanian-laundromat 0 97 44ms 6 Dec 2025 341st tomh1012 0 97 396ms 5 days ago 343rd error256 0 98 155ms 16 Jan 2026 343rd albanian-laundromat 0 98 135ms 23 Feb 2026 343rd edsrzf 🇳🇿 0 98 157ms 3 days ago 346th Shanethegamer 🇺🇸 0 99 352ms 24 Sep 2025 346th madex 🇩🇪 0 99 19ms 29 hours ago 348th edsrzf 🇳🇿 0 100 145ms 9 May 2025 348th JOrE20 0 100 42ms 15 Dec 2025 348th madex 🇩🇪 0 100 113ms 29 hours ago 348th h3ra993huskp 🇯🇵 0 100 392ms 21 hours ago 352nd rucin93 🇵🇱 0 101 373ms 24 days ago 352nd madex 🇩🇪 0 101 141ms 30 hours ago 354th fantaize 0 102 150ms 19 days ago 354th emgordon154 0 102 4ms 4 days ago 354th madex 🇩🇪 0 102 156ms 3 days ago 357th Jacob385 0 103 386ms 31 hours ago 358th CLOStrophobic 🇮🇹 0 104 21ms 18 Jan 2025 358th kasarino 0 104 4ms 4 days ago 360th kg583 🇺🇸 0 106 38ms 9 May 2025 361st Shanethegamer 🇺🇸 0 107 8ms 9 May 2025 361st AlephSquirrel 0 107 20ms 14 May 2025 363rd CLOStrophobic 🇮🇹 0 108 47ms 17 Feb 2025 363rd edsrzf 🇳🇿 0 108 1,839ms 21 May 2025 363rd albanian-laundromat 0 108 31ms 5 Jan 2026 363rd albanian-laundromat 0 108 83ms 20 days ago 367th kg583 🇺🇸 0 109 43ms 26 days ago 367th GolfingSuccess 🇬🇷 0 109 46ms 26 days ago 367th edsrzf 🇳🇿 0 109 43ms 4 days ago 367th edsrzf 🇳🇿 0 109 35ms 3 days ago 371st retrohun 0 111 41ms 5 days ago 372nd GolfingSuccess 🇬🇷 0 112 44ms 24 Jan 2026 373rd Shanethegamer 🇺🇸 0 114 1,281ms 9 May 2025 373rd error256 0 114 513ms 29 Jan 2026 373rd edsrzf 🇳🇿 0 114 489ms 4 days ago 376th emgordon154 0 115 80ms 2 days ago 377th GolfingSuccess 🇬🇷 0 117 283ms 12 Jan 2026 377th albanian-laundromat 0 117 43ms 18 days ago 377th elgan65536 🇺🇸 0 117 156ms 2 hours ago 380th MeWhenI 🇻🇦 0 118 281ms 2 days ago 381st madex 🇩🇪 0 119 1,373ms 29 hours ago 382nd CaedenHarper 🇨🇦 0 120 274ms 5 days ago 382nd emgordon154 0 120 65ms 4 days ago 384th Shanethegamer 🇺🇸 0 121 148ms 13 Dec 2024 384th madex 🇩🇪 0 121 8ms 29 hours ago 386th albanian-laundromat 0 122 264ms 5 Jan 2026 387th stefangimmillaro 0 124 298ms 10 May 2025 387th Shanethegamer 🇺🇸 0 124 147ms 3 Jun 2025 387th madex 🇩🇪 0 124 272ms 29 hours ago 390th AstroOrbis 0 126 23ms 12 Aug 2025 390th btjones0 0 126 168ms 4 days ago 392nd madex 🇩🇪 0 129 366ms 2 days ago 393rd JDiLenarda 🇫🇷 0 131 1,330ms 4 days ago 394th HumanoidCPU 0 133 165ms 4 days ago 395th edsrzf 🇳🇿 0 136 4,806ms 19 May 2025 396th GolfingSuccess 🇬🇷 0 137 93ms 3 days ago 397th Shanethegamer 🇺🇸 0 139 309ms 13 Dec 2024 397th UnderKoen 🇳🇱 0 139 1,178ms 4 days ago 399th canissimia 🇦🇶 0 145 14ms 2 days ago 400th Shanethegamer 🇺🇸 0 146 31ms 9 May 2025 First Prev 321–400 of 408 Next Last